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ABSTRACT
The study was carried out in the screen house of the department of soil science and land management, faculty of agriculture, university of Benin to evaluate remediation of crude oil polluted/ contaminated soil using biochar. The experimental design was RCBD with 3 treatments replicated 3 times. A general pollution/contamination was done for 78kg of soil using crude oil. The soil was left to equilibrate with the crude oil for 2 weeks before biochar was introduced. The soil samples were left for four weeks in the screen house after biochar introduction. The soil samples were watered once a week with 100ml of water per poly pot of 3kg soil. The soil samples were then collected for laboratory analysis, for soil micronutrient and heavy metals, using standard laboratory analytical methods. Results showed that pH content before biochar application was 5.3 and after 4 weeks it had a mean of 6.81. Total organic carbon was 13.4 before application and it had a mean of 68.52 after 4 weeks. Total hydrocarbon was not detected before crude oil contamination but had a mean of 149.49 after 4 weeks.
This study shows biochar potential in the remediation of crude oil polluted soils, with decreases in the values of total hydrocarbon and heavy metals with increased biochar application.
